Distance & Speed

A couple of questions to be solved...

1. Bharat sees Jovie. He estimates that she is 25 leaps away. Jovie sees Bharat and starts running away from him to avoid the meeting. If in every minute, Bharat makes 5 leaps and Jovie makes 6 leaps And 1 leap of Bharat is equal to 2 leaps of Jovie. Find the time in which Bharat meets Jovie (assume an open field with no trees) ?

ans: 12.5 minutes

2. A boat went down the river for a distance of 20 km. It then turned back and returned to its starting point, having travelled a total of 7 hours. On its return trip, at a distance of 12 km from the starting point, it encountered a log, which had passed the starting point at the moment at which the boat had started downstream. The downstream speed of the boat is...?

2. A boat went down the river for a distance of 20 km.
It then turned back and returned to its starting point, having travelled a total of 7 hours.
On its return trip, at a distance of 12 km from the starting point, it encountered a log,
which had passed the starting point at the moment at which the boat had started downstream.
Find the downstream speed of the boat.

Let = speed of the boat in still water.
Let = speed of the current.

The boat went downstream for 20 km at a speed of km/hr.. . This took: hours.

The boat went upstrream for 20 km at a speed of km/hr.. . This took: hours.
The total trip took 7 hours: .

Consider when the boat met the log . . .

The boat had gone downstream 20 km at km/hr.. . This took: hours.
Then the boat went upstream 8 km at km/hr.. . This took: hours.
Total time: .

During this time, the log traveled 12 km at km/hr.. . This took: .
Equate [1] and [2]: .

1. Bharat sees Jovie and estimates that she is 25 leaps away.
Jovie sees Bharat and starts running away from him to avoid the meeting.
If in every minute, Bharat makes 5 leaps and Jovie makes 6 leaps,
and 1 leap of Bharat is equal to 2 leaps of Jovie,
Find the time in which Bharat meets Jovie.

Answer: 12.5 minutes

"Bharat sees Jovie and estimates that she is 25 leaps away.". . This doesn't specify whose leaps are measured here: Bharat's or Jovie's.
I will assume these are Bharat's leaps, which are twice Jovie's.. . Moreover, I'll measure all distances in Jovie's leaps (called Leaps).